<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert
        title="添加商品信息"
        :closable="false"
        center
        show-icon
        type="info"
      >
      </el-alert>
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品信息"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        ref="addFormRef"
        :model="addForm"
        :rules="addFormRules"
        label-width="80px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :before-leave="beforTabLeave"
          :tab-position="'left'"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类：" prop="goods_cat">
              <el-cascader
                :options="catelist"
                :props="cateProps"
                clearable
                v-model="addForm.goods_cat"
                @change="CateChanged"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTabelData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  border
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabelData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="https://www.liulongbin.top:8888/api/private/v1/upload"
              :headers="headerobj"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: "0",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics:[],
        goods_introduce:'',
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_wight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" }
        ]
      },
      catelist: [],
      cateProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      manyTabelData: [],
      onlyTabelData: [],
      headerobj:{
        Authorization:window.sessionStorage.getItem('token')
      },
      previewPath:'',
      previewVisible:false
    };
  },
  methods: {
    async getCateList() {
      const { data } = await this.$http.get("categories");
      if (data.meta.status !== 200) {
        return this.$message.error(data.meta.msg);
      }
      this.catelist = data.data;
    },
    CateChanged() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
        this.$message.error("请选择三级分类");
      }
    },
    beforTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择分类！");
        return false;
      }
    },
    async tabClicked() {
      if (this.activeIndex === "1") {
        const { data } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "many"
            }
          }
        );
        if (data.meta.status !== 200) {
          return this.$message.error(data.meta.msg);
        }
        data.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTabelData = data.data;
      } else {
        const { data } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "only"
            }
          }
        );
        if (data.meta.status !== 200) {
          return this.$message.error(data.meta.msg);
        }
        this.onlyTabelData = data.data;
      }
    },
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    handleRemove(fire) {
      const picPath = fire.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x=>x.pic===picPath)
      this.addForm.pics.splice(i,1)
    },
    handleSuccess(response) {
      const picInfo = {pic:response.data.tmp_path}
      this.addForm.pics.push(picInfo)
    },
    add() {
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid) {
          return this.$message.error('请先填写必填项！')
        }
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        this.manyTabelData.forEach(item => {
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        });
        this.onlyTabelData.forEach(item => {
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        });
        form.attrs = this.addForm.attrs
        const {data} = await this.$http.post('goods',form)
        if (data.meta.status !== 201) {
          return this.$message.error(data.meta.msg);
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  },
  created() {
    this.getCateList();
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    }
  }
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.previewImg{
  width: 100%;
}

.btnAdd{
  margin-top: 15px;
}
</style>
